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Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.

From: Chris Lattner <clattner at apple dot com>
To: H.J. Lu <hjl dot tools at gmail dot com>
Cc: "rajagopal, dwarak" <dwarak dot rajagopal at amd dot com>, Uros Bizjak <ubizjak at gmail dot com>, Richard Guenther <richard dot guenther at gmail dot com>, "Guo, Xuepeng" <xuepeng dot guo at intel dot com>, gcc-patches at gcc dot gnu dot org, jakub at redhat dot com, "Ye, Joey" <joey dot ye at intel dot com>, "Lin, Weiliang" <weiliang dot lin at intel dot com>, "Harle, Christophe" <christophe dot harle at amd dot com>, Sebastian Pop <sebpop at gmail dot com>
Date: Fri, 21 Nov 2008 21:34:12 -0800
Subject: Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
References: <820531547ADB6847AF89CC220F6128F1737F@pdsmsx001.ccr.corp.intel.com> <5659869B-5D04-44A3-A1B5-FD125FDDF765@apple.com> <6dc9ffc80811211223h26ba29a3s2ec37d1e5622283@mail.gmail.com> <4613DBA9-BF19-429F-9B8F-57F8F967940B@apple.com> <6dc9ffc80811211359p24443b80j3278fc8a635b5c7b@mail.gmail.com> <CA9EADC1-DA94-4025-8CB3-796FF65FD0E5@apple.com> <6dc9ffc80811211620u2a578467t2e93311b636a3fc4@mail.gmail.com> <07F78718-6245-4951-8479-3AB811BBEC80@apple.com> <6dc9ffc80811211736j58cfa602m6f2189cc79b0e491@mail.gmail.com> <CB19A7AB-D9F7-4CDE-ACA3-9DAE86CA2F28@apple.com> <6dc9ffc80811211754t7c983d3q7628937519c80666@mail.gmail.com>

On Nov 21, 2008, at 5:54 PM, H.J. Lu wrote:

Let me clarify a few things:

1. We didn't add a new file. We just renamed gmmintrin.h to
immintrin.h.
2. Including <immintrin.h> itself doesn't enable any ISA extensions.
3. You need to use -mXXX to get the XXX extension from
<immintrin.h>. It applies to -mmmx, -msse, ... -mavx.

Sounds good.

4. We will add future new ISA intrinics to a new header file
and include it from <immintrin.h>.


Sounds bad.  Why not just add everything to mmxintrin.h?  How is this
morally different?

Please follow

http://gcc.gnu.org/ml/gcc/2008-11/msg00031.html

Followed. What is the point? Can you please answer my question? Thank you,

-Chris

Follow-Ups:
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu

References:
- [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Guo, Xuepeng
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Chris Lattner
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Chris Lattner
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Chris Lattner
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Chris Lattner
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: Chris Lattner
- Re: [PATCH] A new meta intrinsic header file for current and future x86 instrinsics.
  - From: H.J. Lu

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